A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5985-00-233-6740
NSN 5905-01-547-4184
NSN 5999-00-494-4293
NSN 6645-01-487-8227
NSN 6150-00-104-4572
NSN 6135-01-026-9960
NSN 6220-00-070-9986
NSN 6105-00-372-4716
NSN 6220-01-369-8040
NSN 5998-01-272-6356
NSN 5915-01-327-3617
NSN 5910-01-133-3897